flu strain

Each year, influenza, or the “flu” causes widespread illness, hospitalizations, and even death. But in the 2017-18 flu season, the entire continental US was shown by the Centers for Disease Control to have widespread flu activity this winter. It is the first time since the CDC started monitoring flu activity in this way 13 years ago. Why is the flu so bad this year? The strain of flu that people catch varies from year to year, and there is a typical “flu season” every year. It varies ... [Read More]